1 / 18

Integers

Integers. Here is an example on how to add integers. Think of movements. Ex. 1 : -4 + 3 = -1 You start at the -4 and then move to the right +3. Your final answer is -1. Ex. 2: 5 + -2 = 3 You start at 5 and then move to the left -2 . Your final answer is 3. Add two Negatives.

ethan-strickland
Download Presentation

Integers

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Integers Here is an example on how to add integers. Think of movements. Ex. 1 : -4 + 3 = -1 You start at the -4 and then move to the right +3. Your final answer is -1. Ex. 2: 5 + -2 = 3 You start at 5 and then move to the left -2 . Your final answer is 3.

  2. Add two Negatives Ex. 3 : -2 + -3 = -5 You start at the -2 and then move to the left -3. Your final answer is -5. Ex. 4 : -1 + -3 = -4 You start at the -1 and then move to the left -3. Your final answer is -4.

  3. Practice You Notice that if the signs are DIFFERENT then you subtract. In other words if you have one negative number and a positive number. You would subtract and keep the sign of the larger one. • -3 + 13 = • -5 + 12 = • -9 + 11 = • -21 + 26 = • -12 + -2 = • -4 + -5 = • 5 + -3 = • -13 + 5 = 10 7 2 5 -14 But If the signs are both the SAME then you would add them and keep that sign. -9 2 -8

  4. Practice 0 -13 + 13 = -15 + 12 = -19 + 11 = -31 + 26 = -19 + -2 = -14 + -5 = 18 + -13 = -23 + 15 = -3 -8 -5 -21 -19 5 -8

  5. Homework Textbook Page 112 # 2 – 25 All

  6. Review our Skills Adding Step 1: Lets check if the numbers we are adding areBOTHNEGATIVE (-) or POSITIVE (+). • If “YES” then we will add and keep their sign. Example 1: (+3) + (+1) = +4 or 3 + 1 = 4 Example 2: (-2) + (-5) = -7 • If “NO” then we will subtract and keep the larger number’s sign. Example 1: -13 + 8 = -5 , we know that 13 take away 8 is 5, however the answer is negative because 13 is larger than 8 and 13 is a Negative (-) number. Example 2: 18 + (-11) = 7 , we know that 18 take away 11 is 7, however the answer is positive(+) 7 or 7 because 18 is larger than 11 and 18 is positive (+).

  7. Practice • 24 + (-12) = • 93 + (-44) = • -21 + 84 = • -13 + (-52) = • 82 + (-23) = • -26 + (-19) = • 101+ (-120) = • -151 + 144= • -431 + 565= • 135 + (-111)=

  8. Example 5 15x + (-19x) + (-4x)

  9. Example 6 -15x +(-9)+ (-19x) + 7

  10. Practice • 24 + (-2) = • 33 + (-44) = • -21 + 14 = • -13 + (-2) = • 12 + (-23) = • -16 + (-12) = • 11+ (-12) = • -11 + 14= • -43 + 5= • 35 + (-11)=

  11. Practice • 264 + (-762) = • 333 + (-144) = • -21 + 164 = • -13 + (-222) = • 121 + (-23) = • -161 + (-12) = • 111+ (-12) = • -111 + 14= • -431 + 5= • 351 + (-11)=

  12. Example 5 • 1.4 + (-2.6) + 3.1 = 1.4 + (-2.6 )+ 3.1 = -1.2 + 3.1= = 1.9

  13. Practice 0.4 • 2.4 + (-2) = • 3.3 + (-4.4) = • -2.1 + 14 = • -1.3 + (-2) = • 1.2 + (-2.3) = • -1.6 + (-1.2) = • 11+ (-1.2) = • -11 + 1.4= -1.1 11.9 -3.3 -1.1 -1.8 9.8 -9.6

  14. Example 6 5 + x + (-8) ; x = 4 5+ (4) + -8 = 9 + -8= = 1

  15. Practice 7 • 12 + (-2) + x ; x = -3 • 3 + (-4) + y ; y = 4 • -2 + 14 + x ; x = -10 • -3 + (-2) + h ; h= 8 • 2 + (-3) + x ; x = -5 3 2 3 -6

  16. Practice -2 10 + (-26) = -16 • 12 + (-14) = • (-16) + 31 = • 28 + ( -55) = • 23 + 46 = • -14 + (-17) = • 67 + 18 = • (-28) + (-21) = • (-67) + 93 = 9) 10 – 26 = 10) (-15) – 25 = 11) (-27) – 87 = 12) 35 – (-13) = 13) (-15) – (-22) = 14) 33 – (-31) = 15) 21 – (-55) = 16) -44 – (-23) = 15 -15 + (-25) = -40 -27 -27 + (-87) = -114 69 35 + (+13) = 48 -15 + (+22) = 7 -31 33 + (+31) = 64 85 21 + (+55) = 76 -49 -44 + (+23) = -21 26 Understand that when you add (+) there is NOT Any changes, but when you subtract (–) there IS.

  17. Warm-Up 9/22 25.4429 221.7004 16560 9913 Solve the following 23.438 + 2.0049 = 234.0004 – 12.300 = 48 x 345 = 23 x 431 = 13 + -8 = -21 + 47 = 13 + -24 = 5 26 -11

  18. Warm-Up Tell me the place value and then round it off. • 3,456.993 • 3,456.993 • 3,456.993 • 3,456.993 • 3,456.993 • 819,534.1 • 819,534.1 • 819,534.1 • 819,534.1 • 819,534.1 3,500.000 Hundred 3,460.000 Tens 3,457.000 Ones 3,000.000, Hundred Thousands 3,456.990 Hundredths 820,000.0 Ten Thousands 819,500.0 Hundreds 819,534.0 Ones 820,000.0 Thousands 800,000.0 Hundred Thousands

More Related